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In 2155 in the Mirror universe, the Tholians use tricobalt devices to create an interphasic rift through which they sent a distress call in order to draw ships to them. They succeeded in drawing the primary universe's USS Defiant through the rift, allowing the Tholians to capture Defiant. (ENT episode: "In a Mirror, Darkly")
In 2268, an Arne Darvin from 2373 travelled back in time with a tricobalt device contained in a tribble with the hope that it would detonate near James T. Kirk. His efforts would be stopped by the crew of Deep Space 9. (DS9 episode: "Trials and Tribble-ations")